Signal for indicating the proximity of vehicles



FIG. 1 is a perspective view of a signal for indicating the proximity of vehicles, showing our new design, with the cords broken away to indicate indeterminate length;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof, the rear being the same in appearance;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a signal for indicating the proximity of vehicles, as shown and described. 